/**
* gst_gl_context_can_share:
* @context: a #GstGLContext
* @other_context: another #GstGLContext
*
* Note: This will always fail for two wrapped #GstGLContext's
*
* Returns: whether @context and @other_context are able to share OpenGL
* resources.
*
* Since: 1.6
*/
gboolean
gst_gl_context_can_share (GstGLContext * context, GstGLContext * other_context)
{
g_return_val_if_fail (GST_IS_GL_CONTEXT (context), FALSE);
g_return_val_if_fail (GST_IS_GL_CONTEXT (other_context), FALSE);
/* check if the contexts are descendants or the root nodes are the same */
return context->priv->sharegroup_id != 0
&& context->priv->sharegroup_id == other_context->priv->sharegroup_id;
}
/**
* gst_gl_allocation_params_init:
* @params: the #GstGLAllocationParams to initialize
* @struct_size: the struct size of the implementation
* @alloc: some alloc flags
* @copy: a copy function
* @free: a free function
* @context: (transfer none): a #GstGLContext
* @alloc_size: the number of bytes to allocate.
* @alloc_params: (transfer none) (allow-none): a #GstAllocationParams to apply
* @wrapped_data: (transfer none) (allow-none): a sysmem data pointer to initialize the allocation with
* @gl_handle: (transfer none): a GL handle to initialize the allocation with
* @user_data: (transfer none) (allow-none): user data to call @notify with
* @notify: (allow-none): a #GDestroyNotify
*
* @notify will be called once for each allocated memory using these @params
* when freeing the memory.
*
* Returns: whether the paramaters could be initialized
*/
gboolean
gst_gl_allocation_params_init (GstGLAllocationParams * params,
gsize struct_size, guint alloc_flags, GstGLAllocationParamsCopyFunc copy,
GstGLAllocationParamsFreeFunc free, GstGLContext * context,
gsize alloc_size, GstAllocationParams * alloc_params,
gpointer wrapped_data, guint gl_handle, gpointer user_data,
GDestroyNotify notify)
{
memset (params, 0, sizeof (*params));
g_return_val_if_fail (struct_size > 0, FALSE);
g_return_val_if_fail (copy != NULL, FALSE);
g_return_val_if_fail (free != NULL, FALSE);
g_return_val_if_fail (GST_IS_GL_CONTEXT (context), FALSE);
params->struct_size = struct_size;
params->alloc_size = alloc_size;
params->copy = copy;
params->free = free;
params->alloc_flags = alloc_flags;
params->context = gst_object_ref (context);
if (alloc_params)
params->alloc_params = gst_allocation_params_copy (alloc_params);
params->notify = notify;
params->user_data = user_data;
params->wrapped_data = wrapped_data;
params->gl_handle = gl_handle;
return TRUE;
}
/**
* gst_gl_context_activate:
* @context: a #GstGLContext
* @activate: %TRUE to activate, %FALSE to deactivate
*
* (De)activate the OpenGL context represented by this @context.
*
* In OpenGL terms, calls eglMakeCurrent or similar with this context and the
* currently set window. See gst_gl_context_set_window() for details.
*
* Returns: Whether the activation succeeded
*
* Since: 1.4
*/
gboolean
gst_gl_context_activate (GstGLContext * context, gboolean activate)
{
GstGLContextClass *context_class;
gboolean result;
g_return_val_if_fail (GST_IS_GL_CONTEXT (context), FALSE);
context_class = GST_GL_CONTEXT_GET_CLASS (context);
g_return_val_if_fail (context_class->activate != NULL, FALSE);
GST_DEBUG_OBJECT (context, "activate:%d", activate);
GST_OBJECT_LOCK (context);
result = context_class->activate (context, activate);
if (result && activate) {
context->priv->active_thread = g_thread_self ();
g_private_set (¤t_context_key, context);
} else {
context->priv->active_thread = NULL;
g_private_set (¤t_context_key, NULL);
}
GST_OBJECT_UNLOCK (context);
return result;
}
gboolean
gst_gl_context_supports_glsl_profile_version (GstGLContext * context,
GstGLSLVersion version, GstGLSLProfile profile)
{
g_return_val_if_fail (GST_IS_GL_CONTEXT (context), FALSE);
if (!_is_valid_version_profile (version, profile))
return FALSE;
if (profile != GST_GLSL_PROFILE_NONE) {
if (gst_gl_context_check_gl_version (context, GST_GL_API_GLES2, 2, 0)) {
if ((profile & GST_GLSL_PROFILE_ES) == 0)
return FALSE;
} else if ((gst_gl_context_get_gl_api (context) & GST_GL_API_OPENGL) != 0) {
if ((profile & GST_GLSL_PROFILE_COMPATIBILITY) == 0)
return FALSE;
} else if ((gst_gl_context_get_gl_api (context) & GST_GL_API_OPENGL3) != 0) {
/* GL_ARB_es2_compatibility is requried for GL3 contexts */
if ((profile & (GST_GLSL_PROFILE_CORE | GST_GLSL_PROFILE_ES)) == 0)
return FALSE;
} else {
g_assert_not_reached ();
}
}
if (version != GST_GLSL_VERSION_NONE) {
GstGLAPI gl_api;
gint maj, min, glsl_version;
if (gst_gl_context_check_gl_version (context, GST_GL_API_GLES2, 3, 1)) {
if (version > GST_GLSL_VERSION_310)
return FALSE;
} else if (gst_gl_context_check_gl_version (context, GST_GL_API_GLES2, 3,
0)) {
if (version > GST_GLSL_VERSION_300)
return FALSE;
} else if (gst_gl_context_check_gl_version (context, GST_GL_API_GLES2, 2,
0)) {
if (version > GST_GLSL_VERSION_100)
return FALSE;
}
gl_api = gst_gl_context_get_gl_api (context);
gst_gl_context_get_gl_version (context, &maj, &min);
glsl_version = gst_gl_version_to_glsl_version (gl_api, maj, min);
if (glsl_version > version)
return FALSE;
if (gst_gl_context_check_gl_version (context, GST_GL_API_OPENGL3, 1, 0))
/* GL_ARB_es2_compatibility is requried for GL3 contexts */
if (version < GST_GLSL_VERSION_150 && version != GST_GLSL_VERSION_100)
return FALSE;
if (gst_gl_context_check_gl_version (context, GST_GL_API_OPENGL, 1, 0)
&& version < GST_GLSL_VERSION_110)
return FALSE;
}
return TRUE;
}
/**
* gst_gl_context_thread_add:
* @context: a #GstGLContext
* @func: a #GstGLContextThreadFunc
* @data: (closure): user data to call @func with
*
* Execute @func in the OpenGL thread of @context with @data
*
* MT-safe
*
* Since: 1.4
*/
void
gst_gl_context_thread_add (GstGLContext * context,
GstGLContextThreadFunc func, gpointer data)
{
GstGLWindow *window;
RunGenericData rdata;
g_return_if_fail (GST_IS_GL_CONTEXT (context));
g_return_if_fail (func != NULL);
if (GST_IS_GL_WRAPPED_CONTEXT (context)) {
g_return_if_fail (context->priv->active_thread == g_thread_self ());
func (context, data);
return;
}
rdata.context = context;
rdata.data = data;
rdata.func = func;
window = gst_gl_context_get_window (context);
gst_gl_window_send_message (window,
GST_GL_WINDOW_CB (_gst_gl_context_thread_run_generic), &rdata);
gst_object_unref (window);
}
/**
* gst_gl_context_get_display:
* @context: a #GstGLContext:
*
* Returns: the #GstGLDisplay associated with this @context
*
* Since: 1.4
*/
GstGLDisplay *
gst_gl_context_get_display (GstGLContext * context)
{
g_return_val_if_fail (GST_IS_GL_CONTEXT (context), NULL);
return gst_object_ref (context->display);
}
void
gst_gl_query_init (GstGLQuery * query, GstGLContext * context,
GstGLQueryType query_type)
{
const GstGLFuncs *gl;
g_return_if_fail (query != NULL);
g_return_if_fail (GST_IS_GL_CONTEXT (context));
gl = context->gl_vtable;
memset (query, 0, sizeof (*query));
_init_debug ();
query->context = gst_object_ref (context);
query->query_type = _gst_gl_query_type_to_gl (query_type);
query->supported = _context_supports_query_type (context, query->query_type);
if (query->supported)
gl->GenQueries (1, &query->query_id);
gst_gl_async_debug_init (&query->debug);
query->debug.callback = _log_time;
query->debug.user_data = query;
}
/**
* gst_gl_buffer_allocation_params_new:
* @context: a #GstGLContext
* @alloc_size: the size in bytes to allocate
* @alloc_params: (allow-none): the #GstAllocationParams for @tex_id
* @gl_target: the OpenGL target to allocate
* @gl_usage: the OpenGL usage hint to allocate with
*
* Returns: a new #GstGLBufferAllocationParams for allocating OpenGL buffer
* objects
*
* Since: 1.8
*/
GstGLBufferAllocationParams *
gst_gl_buffer_allocation_params_new (GstGLContext * context, gsize alloc_size,
GstAllocationParams * alloc_params, guint gl_target, guint gl_usage)
{
GstGLBufferAllocationParams *params;
g_return_val_if_fail (GST_IS_GL_CONTEXT (context), NULL);
g_return_val_if_fail (alloc_size > 0, NULL);
params = g_new0 (GstGLBufferAllocationParams, 1);
if (!gst_gl_allocation_params_init (¶ms->parent, sizeof (*params),
GST_GL_ALLOCATION_PARAMS_ALLOC_FLAG_BUFFER |
GST_GL_ALLOCATION_PARAMS_ALLOC_FLAG_ALLOC,
(GstGLAllocationParamsCopyFunc)
_gst_gl_buffer_allocation_params_copy_data,
(GstGLAllocationParamsFreeFunc)
_gst_gl_buffer_allocation_params_free_data, context, alloc_size,
alloc_params, NULL, 0, NULL, NULL)) {
g_free (params);
return NULL;
}
params->gl_target = gl_target;
params->gl_usage = gl_usage;
return params;
}
gchar *
_gst_glsl_mangle_shader (const gchar * str, guint shader_type,
GstGLTextureTarget from, GstGLTextureTarget to, GstGLContext * context,
GstGLSLVersion * version, GstGLSLProfile * profile)
{
gchar *tmp, *tmp2;
_init_debug ();
g_return_val_if_fail (GST_IS_GL_CONTEXT (context), NULL);
_mangle_version_profile_from_gl_api (context, from, to, version, profile);
tmp2 =
_mangle_external_image_extension (str, context, from, to, *version,
*profile);
tmp = _mangle_texture_access (tmp2, context, from, to, *version, *profile);
g_free (tmp2);
tmp2 = _mangle_sampler_type (tmp, from, to);
g_free (tmp);
tmp = _mangle_varying_attribute (tmp2, shader_type, *version, *profile);
g_free (tmp2);
if (shader_type == GL_FRAGMENT_SHADER) {
if ((*profile == GST_GLSL_PROFILE_ES && *version >= GST_GLSL_VERSION_300)
|| (*profile == GST_GLSL_PROFILE_CORE
&& *version >= GST_GLSL_VERSION_150)) {
tmp2 = _mangle_frag_color_data (tmp);
g_free (tmp);
tmp = tmp2;
}
}
return tmp;
}
Gst3DRenderer *
gst_3d_renderer_new (GstGLContext * context)
{
g_return_val_if_fail (GST_IS_GL_CONTEXT (context), NULL);
Gst3DRenderer *renderer = g_object_new (GST_3D_TYPE_RENDERER, NULL);
renderer->context = gst_object_ref (context);
return renderer;
}
/**
* gst_gl_context_get_gl_platform:
* @context: a #GstGLContext:
*
* Gets the OpenGL platform that used by @context.
*
* Returns: The platform specific backing OpenGL context
*
* Since: 1.4
*/
GstGLPlatform
gst_gl_context_get_gl_platform (GstGLContext * context)
{
GstGLContextClass *context_class;
g_return_val_if_fail (GST_IS_GL_CONTEXT (context), 0);
context_class = GST_GL_CONTEXT_GET_CLASS (context);
g_return_val_if_fail (context_class->get_gl_platform != NULL, 0);
return context_class->get_gl_platform (context);
}
/**
* gst_gl_context_destroy:
* @context: a #GstGLContext:
*
* Destroys an OpenGL context.
*
* Should only be called after gst_gl_context_create() has been successfully
* called for this context.
*
* Since: 1.6
*/
void
gst_gl_context_destroy (GstGLContext * context)
{
GstGLContextClass *context_class;
g_return_if_fail (GST_IS_GL_CONTEXT (context));
context_class = GST_GL_CONTEXT_GET_CLASS (context);
g_return_if_fail (context_class->destroy_context != NULL);
context_class->destroy_context (context);
}
/**
* gst_gl_context_get_gl_api:
* @context: a #GstGLContext
*
* Get the currently enabled OpenGL api.
*
* The currently available API may be limited by the #GstGLDisplay in use and/or
* the #GstGLWindow chosen.
*
* Returns: the available OpenGL api
*
* Since: 1.4
*/
GstGLAPI
gst_gl_context_get_gl_api (GstGLContext * context)
{
GstGLContextClass *context_class;
g_return_val_if_fail (GST_IS_GL_CONTEXT (context), GST_GL_API_NONE);
context_class = GST_GL_CONTEXT_GET_CLASS (context);
g_return_val_if_fail (context_class->get_gl_api != NULL, GST_GL_API_NONE);
return context_class->get_gl_api (context);
}
/**
* gst_gl_context_get_gl_version:
* @context: a #GstGLContext
* @maj: (out): resulting major version
* @min: (out): resulting minor version
*
* Returns the OpenGL version implemented by @context. See
* gst_gl_context_get_gl_api() for retreiving the OpenGL api implemented by
* @context.
*
* Since: 1.4
*/
void
gst_gl_context_get_gl_version (GstGLContext * context, gint * maj, gint * min)
{
g_return_if_fail (GST_IS_GL_CONTEXT (context));
g_return_if_fail (maj != NULL && min != NULL);
if (maj)
*maj = context->priv->gl_major;
if (min)
*min = context->priv->gl_minor;
}
/**
* gst_gl_context_clear_shader:
* @context: a #GstGLContext
*
* Clear's the currently set shader from the GL state machine.
*
* Note: must be called in the GL thread.
*/
void
gst_gl_context_clear_shader (GstGLContext * context)
{
GstGLFuncs *gl;
g_return_if_fail (GST_IS_GL_CONTEXT (context));
gl = context->gl_vtable;
if (gl->CreateProgram)
gl->UseProgram (0);
else if (gl->CreateProgramObject)
gl->UseProgramObject (0);
}
/**
* gst_gl_context_get_gl_context:
* @context: a #GstGLContext:
*
* Gets the backing OpenGL context used by @context.
*
* Returns: The platform specific backing OpenGL context
*
* Since: 1.4
*/
guintptr
gst_gl_context_get_gl_context (GstGLContext * context)
{
GstGLContextClass *context_class;
guintptr result;
g_return_val_if_fail (GST_IS_GL_CONTEXT (context), 0);
context_class = GST_GL_CONTEXT_GET_CLASS (context);
g_return_val_if_fail (context_class->get_gl_context != NULL, 0);
result = context_class->get_gl_context (context);
return result;
}
/**
* gst_gl_context_get_window:
* @context: a #GstGLContext
*
* Returns: the currently set window
*
* Since: 1.4
*/
GstGLWindow *
gst_gl_context_get_window (GstGLContext * context)
{
g_return_val_if_fail (GST_IS_GL_CONTEXT (context), NULL);
if (GST_IS_GL_WRAPPED_CONTEXT (context)) {
GST_WARNING_OBJECT (context, "context is not toplevel, returning NULL");
return NULL;
}
_ensure_window (context);
return gst_object_ref (context->window);
}
/**
* gst_gl_context_get_proc_address:
* @context: a #GstGLContext
* @name: an opengl function name
*
* Get a function pointer to a specified opengl function, @name. If the the
* specific function does not exist, NULL is returned instead.
*
* Platform specfic functions (names starting 'egl', 'glX', 'wgl', etc) can also
* be retrieved using this method.
*
* Returns: a function pointer or NULL
*
* Since: 1.4
*/
gpointer
gst_gl_context_get_proc_address (GstGLContext * context, const gchar * name)
{
gpointer ret;
GstGLContextClass *context_class;
GstGLAPI gl_api;
g_return_val_if_fail (GST_IS_GL_CONTEXT (context), NULL);
context_class = GST_GL_CONTEXT_GET_CLASS (context);
g_return_val_if_fail (context_class->get_proc_address != NULL, NULL);
gl_api = gst_gl_context_get_gl_api (context);
ret = context_class->get_proc_address (gl_api, name);
return ret;
}
/**
* gst_gl_display_add_context:
* @display: a #GstGLDisplay
* @context: (transfer none): a #GstGLContext
*
* Returns: whether @context was successfully added. %FALSE may be returned
* if there already exists another context for @context's active thread.
*
* Must be called with the object lock held.
*
* Since: 1.6
*/
gboolean
gst_gl_display_add_context (GstGLDisplay * display, GstGLContext * context)
{
GstGLContext *collision = NULL;
GstGLDisplay *context_display;
gboolean ret = TRUE;
GThread *thread;
GWeakRef *ref;
g_return_val_if_fail (GST_IS_GL_DISPLAY (display), FALSE);
g_return_val_if_fail (GST_IS_GL_CONTEXT (context), FALSE);
context_display = gst_gl_context_get_display (context);
g_assert (context_display == display);
gst_object_unref (context_display);
thread = gst_gl_context_get_thread (context);
if (thread) {
collision = _get_gl_context_for_thread_unlocked (display, thread);
g_thread_unref (thread);
/* adding the same context is a no-op */
if (context == collision) {
ret = TRUE;
goto out;
}
if (_check_collision (context, collision)) {
ret = FALSE;
goto out;
}
}
ref = g_new0 (GWeakRef, 1);
g_weak_ref_init (ref, context);
display->priv->contexts = g_list_prepend (display->priv->contexts, ref);
out:
if (collision)
gst_object_unref (collision);
GST_DEBUG_OBJECT (display, "%ssuccessfully inserted context %" GST_PTR_FORMAT,
ret ? "" : "un", context);
return ret;
}
/**
* gst_gl_context_check_feature:
* @context: a #GstGLContext
* @feature: a platform specific feature
*
* Some features require that the context be created before it is possible to
* determine their existence and so will fail if that is not the case.
*
* Returns: Whether @feature is supported by @context
*
* Since: 1.4
*/
gboolean
gst_gl_context_check_feature (GstGLContext * context, const gchar * feature)
{
GstGLContextClass *context_class;
g_return_val_if_fail (GST_IS_GL_CONTEXT (context), FALSE);
g_return_val_if_fail (feature != NULL, FALSE);
context_class = GST_GL_CONTEXT_GET_CLASS (context);
if (g_strstr_len (feature, 3, "GL_"))
return gst_gl_check_extension (feature, context->priv->gl_exts);
if (!context_class->check_feature)
return FALSE;
return context_class->check_feature (context, feature);
}
/**
* gst_buffer_add_gl_sync_meta_full:
* @context: a #GstGLContext
* @buffer: a #GstBuffer
* @data: sync data to hold
*
* Returns: (transfer none): the #GstGLSyncMeta added to #GstBuffer
*
* Since: 1.8
*/
GstGLSyncMeta *
gst_buffer_add_gl_sync_meta_full (GstGLContext * context, GstBuffer * buffer,
gpointer data)
{
GstGLSyncMeta *meta;
g_return_val_if_fail (GST_IS_GL_CONTEXT (context), NULL);
meta =
(GstGLSyncMeta *) gst_buffer_add_meta ((buffer), GST_GL_SYNC_META_INFO,
NULL);
if (!meta)
return NULL;
meta->context = gst_object_ref (context);
meta->data = data;
return meta;
}
/**
* gst_gl_context_check_gl_version:
* @context: a #GstGLContext
* @api: api type required
* @maj: major version required
* @min: minor version required
*
* Returns: whether OpenGL context implements the required api and specified
* version.
*
* Since: 1.4
*/
gboolean
gst_gl_context_check_gl_version (GstGLContext * context, GstGLAPI api,
gint maj, gint min)
{
g_return_val_if_fail (GST_IS_GL_CONTEXT (context), FALSE);
if (maj > context->priv->gl_major)
return FALSE;
if ((gst_gl_context_get_gl_api (context) & api) == GST_GL_API_NONE)
return FALSE;
if (maj < context->priv->gl_major)
return TRUE;
if (min > context->priv->gl_minor)
return FALSE;
return TRUE;
}
static GstGLShader *
_new_with_stages_va_list (GstGLContext * context, GError ** error,
va_list varargs)
{
GstGLShader *shader;
GstGLSLStage *stage;
gboolean to_unref_and_out = FALSE;
g_return_val_if_fail (GST_IS_GL_CONTEXT (context), NULL);
shader = g_object_new (GST_TYPE_GL_SHADER, NULL);
gst_object_ref_sink (shader);
shader->context = gst_object_ref (context);
while ((stage = va_arg (varargs, GstGLSLStage *))) {
if (to_unref_and_out) {
gst_object_unref (stage);
continue;
}
if (!gst_glsl_stage_compile (stage, error)) {
gst_object_unref (stage);
to_unref_and_out = TRUE;
continue;
}
if (!gst_gl_shader_attach (shader, stage)) {
g_set_error (error, GST_GLSL_ERROR, GST_GLSL_ERROR_PROGRAM,
"Failed to attach stage to program");
to_unref_and_out = TRUE;
continue;
}
}
if (to_unref_and_out) {
gst_object_unref (shader);
return NULL;
}
return shader;
}
/**
* gst_gl_context_create:
* @context: a #GstGLContext:
* @other_context: (allow-none): a #GstGLContext to share OpenGL objects with
* @error: (allow-none): a #GError
*
* Creates an OpenGL context in the current thread with the specified
* @other_context as a context to share shareable OpenGL objects with. See the
* OpenGL specification for what is shared between contexts.
*
* If an error occurs, and @error is not %NULL, then error will contain details
* of the error and %FALSE will be returned.
*
* Should only be called once.
*
* Returns: whether the context could successfully be created
*
* Since: 1.4
*/
gboolean
gst_gl_context_create (GstGLContext * context,
GstGLContext * other_context, GError ** error)
{
gboolean alive = FALSE;
g_return_val_if_fail (GST_IS_GL_CONTEXT (context), FALSE);
g_return_val_if_fail (!GST_IS_GL_WRAPPED_CONTEXT (context), FALSE);
GST_DEBUG_OBJECT (context, " other_context:%" GST_PTR_FORMAT, other_context);
_ensure_window (context);
g_mutex_lock (&context->priv->render_lock);
if (!context->priv->created) {
g_weak_ref_set (&context->priv->other_context_ref, other_context);
context->priv->error = error;
if (other_context == NULL)
context->priv->sharegroup_id = _new_sharegroup_id ();
else
context->priv->sharegroup_id = other_context->priv->sharegroup_id;
context->priv->gl_thread = g_thread_new ("gstglcontext",
(GThreadFunc) gst_gl_context_create_thread, context);
g_cond_wait (&context->priv->create_cond, &context->priv->render_lock);
context->priv->created = TRUE;
GST_INFO_OBJECT (context, "gl thread created");
}
alive = context->priv->alive;
g_mutex_unlock (&context->priv->render_lock);
return alive;
}
/**
* gst_gl_handle_context_query:
* @element: a #GstElement
* @query: a #GstQuery of type %GST_QUERY_CONTEXT
* @display: (transfer none) (nullable): a #GstGLDisplay
* @context: (transfer none) (nullable): a #GstGLContext
* @other_context: (transfer none) (nullable): application provided #GstGLContext
*
* Returns: Whether the @query was successfully responded to from the passed
* @display, @context, and @other_context.
*/
gboolean
gst_gl_handle_context_query (GstElement * element, GstQuery * query,
GstGLDisplay * display, GstGLContext * gl_context,
GstGLContext * other_context)
{
const gchar *context_type;
GstContext *context, *old_context;
g_return_val_if_fail (GST_IS_ELEMENT (element), FALSE);
g_return_val_if_fail (GST_IS_QUERY (query), FALSE);
g_return_val_if_fail (display == NULL || GST_IS_GL_DISPLAY (display), FALSE);
g_return_val_if_fail (gl_context == NULL
|| GST_IS_GL_CONTEXT (gl_context), FALSE);
g_return_val_if_fail (other_context == NULL
|| GST_IS_GL_CONTEXT (other_context), FALSE);
GST_LOG_OBJECT (element, "handle context query %" GST_PTR_FORMAT, query);
gst_query_parse_context_type (query, &context_type);
if (display && g_strcmp0 (context_type, GST_GL_DISPLAY_CONTEXT_TYPE) == 0) {
gst_query_parse_context (query, &old_context);
if (old_context)
context = gst_context_copy (old_context);
else
context = gst_context_new (GST_GL_DISPLAY_CONTEXT_TYPE, TRUE);
gst_context_set_gl_display (context, display);
gst_query_set_context (query, context);
gst_context_unref (context);
GST_DEBUG_OBJECT (element, "successfully set %" GST_PTR_FORMAT
" on %" GST_PTR_FORMAT, display, query);
return TRUE;
}
#if GST_GL_HAVE_WINDOW_X11
else if (display && g_strcmp0 (context_type, "gst.x11.display.handle") == 0) {
GstStructure *s;
gst_query_parse_context (query, &old_context);
if (old_context)
context = gst_context_copy (old_context);
else
context = gst_context_new ("gst.x11.display.handle", TRUE);
if (gst_gl_display_get_handle_type (display) & GST_GL_DISPLAY_TYPE_X11) {
Display *x11_display = (Display *) gst_gl_display_get_handle (display);
if (x11_display) {
s = gst_context_writable_structure (context);
gst_structure_set (s, "display", G_TYPE_POINTER, x11_display, NULL);
gst_query_set_context (query, context);
gst_context_unref (context);
GST_DEBUG_OBJECT (element, "successfully set x11 display %p (from %"
GST_PTR_FORMAT ") on %" GST_PTR_FORMAT, x11_display, display,
query);
return TRUE;
}
}
}
#endif
#if GST_GL_HAVE_WINDOW_WAYLAND
else if (display
&& g_strcmp0 (context_type, "GstWaylandDisplayHandleContextType") == 0) {
GstStructure *s;
gst_query_parse_context (query, &old_context);
if (old_context)
context = gst_context_copy (old_context);
else
context = gst_context_new ("GstWaylandDisplayHandleContextType", TRUE);
if (gst_gl_display_get_handle_type (display) & GST_GL_DISPLAY_TYPE_WAYLAND) {
struct wl_display *wayland_display =
(struct wl_display *) gst_gl_display_get_handle (display);
if (wayland_display) {
s = gst_context_writable_structure (context);
gst_structure_set (s, "display", G_TYPE_POINTER, wayland_display, NULL);
gst_query_set_context (query, context);
gst_context_unref (context);
GST_DEBUG_OBJECT (element, "successfully set wayland display %p (from %"
GST_PTR_FORMAT ") on %" GST_PTR_FORMAT, wayland_display, display,
query);
return TRUE;
}
}
}
#endif
else if (other_context && g_strcmp0 (context_type, "gst.gl.app_context") == 0) {
GstStructure *s;
gst_query_parse_context (query, &old_context);
if (old_context)
context = gst_context_copy (old_context);
else
context = gst_context_new ("gst.gl.app_context", TRUE);
s = gst_context_writable_structure (context);
gst_structure_set (s, "context", GST_TYPE_GL_CONTEXT, other_context, NULL);
gst_query_set_context (query, context);
gst_context_unref (context);
GST_DEBUG_OBJECT (element, "successfully set application GL context %"
GST_PTR_FORMAT " on %" GST_PTR_FORMAT, other_context, query);
return TRUE;
} else if (gl_context
&& g_strcmp0 (context_type, "gst.gl.local_context") == 0) {
GstStructure *s;
gst_query_parse_context (query, &old_context);
if (old_context)
context = gst_context_copy (old_context);
else
context = gst_context_new ("gst.gl.local_context", TRUE);
s = gst_context_writable_structure (context);
gst_structure_set (s, "context", GST_TYPE_GL_CONTEXT, gl_context, NULL);
gst_query_set_context (query, context);
gst_context_unref (context);
GST_DEBUG_OBJECT (element, "successfully set GL context %"
GST_PTR_FORMAT " on %" GST_PTR_FORMAT, gl_context, query);
return TRUE;
}
return FALSE;
}
/**
* gst_gl_context_fill_info:
* @context: a #GstGLContext:
*
* Fills @context's info (version, extensions, vtable, etc) from the GL
* context in the current thread. Typically used with wrapped contexts to
* allow wrapped contexts to be used as regular #GstGLContext's.
*
* Since: 1.6
*/
gboolean
gst_gl_context_fill_info (GstGLContext * context, GError ** error)
{
GstGLFuncs *gl;
GString *ext_g_str = NULL;
const gchar *ext_const_c_str = NULL;
GstGLAPI gl_api;
gboolean ret;
g_return_val_if_fail (GST_IS_GL_CONTEXT (context), FALSE);
g_return_val_if_fail (context->priv->active_thread == g_thread_self (),
FALSE);
gl = context->gl_vtable;
gl_api = gst_gl_context_get_gl_api (context);
gl->GetError = gst_gl_context_get_proc_address (context, "glGetError");
gl->GetString = gst_gl_context_get_proc_address (context, "glGetString");
gl->GetStringi = gst_gl_context_get_proc_address (context, "glGetStringi");
gl->GetIntegerv = gst_gl_context_get_proc_address (context, "glGetIntegerv");
if (!gl->GetError || !gl->GetString) {
g_set_error (error, GST_GL_CONTEXT_ERROR, GST_GL_CONTEXT_ERROR_FAILED,
"could not GetProcAddress core opengl functions");
goto failure;
}
/* gl api specific code */
ret = _create_context_info (context, gl_api, &context->priv->gl_major,
&context->priv->gl_minor, error);
if (!ret) {
g_assert (error == NULL || *error != NULL);
goto failure;
}
/* GL core contexts and GLES3 */
if (gl->GetIntegerv && gl->GetStringi && context->priv->gl_major >= 3)
ext_g_str = _build_extension_string (context);
if (ext_g_str && ext_g_str->len) {
GST_DEBUG_OBJECT (context, "GL_EXTENSIONS: %s", ext_g_str->str);
_gst_gl_feature_check_ext_functions (context, context->priv->gl_major,
context->priv->gl_minor, ext_g_str->str);
context->priv->gl_exts = g_string_free (ext_g_str, FALSE);
} else {
ext_const_c_str = (const gchar *) gl->GetString (GL_EXTENSIONS);
if (!ext_const_c_str)
ext_const_c_str = "";
GST_DEBUG_OBJECT (context, "GL_EXTENSIONS: %s", ext_const_c_str);
_gst_gl_feature_check_ext_functions (context, context->priv->gl_major,
context->priv->gl_minor, ext_const_c_str);
context->priv->gl_exts = g_strdup (ext_const_c_str);
}
if (gl_api & GST_GL_API_OPENGL3
&& !gst_gl_context_check_gl_version (context, GST_GL_API_OPENGL3, 4, 1)
&& !gst_gl_check_extension ("GL_ARB_ES2_compatibility",
context->priv->gl_exts)) {
g_set_error (error, GST_GL_CONTEXT_ERROR, GST_GL_CONTEXT_ERROR_FAILED,
"An opengl3 context created but the required ES2 compatibility was not found");
goto failure;
}
/* Does not implement OES_vertex_array_object properly, see
* https://bugzilla.gnome.org/show_bug.cgi?id=750185 */
if (g_strcmp0 ((const gchar *) gl->GetString (GL_VENDOR),
"Imagination Technologies") == 0
&& g_strcmp0 ((const gchar *) gl->GetString (GL_RENDERER),
"PowerVR SGX 544MP") == 0) {
gl->GenVertexArrays = NULL;
gl->DeleteVertexArrays = NULL;
gl->BindVertexArray = NULL;
gl->IsVertexArray = NULL;
}
return TRUE;
failure:
return FALSE;
}
